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We present high spectral resolution (v ∼ 12 − 16 km s −1) Brackett line spec-troscopy of the blue compact dwarf galaxy Henize 2-10 made with NIRSPEC on the Keck Telescope. The spatial resolution is seeing limited, at 1 ′′. We detect two distinct kinematic features separated by approximately 3 ′′ , with heliocentric velocities of ∼860 and ∼890 km s −1. In(More)
Hidden from optical view in the starburst region of the dwarf galaxy NGC 5253 lies an intense radio source with an unusual spectrum which could be interpreted variously as nebular gas ionized by a young stellar cluster or nonthermal emission from a radio supernova or an AGN. We have obtained 11.7 and 18.7 µm images of this region at the Keck Telescope and(More)
We have imaged emission from the millimeter lines of eight molecules—C 2 H, C and SO—in the central half-kiloparsec of the nearby spiral galaxy IC 342. The 5 00 ($50 pc) resolution images were made with the Owens Valley Millimeter Array. Using these and previously published CO and HCN images, we obtain a picture of the chemistry within the nuclear region on(More)
This paper presents a new coherent optical method whereby the partial derivatives of the contour of an object are measured. The object to be studied is immersed in a refractive medium and is imaged by a camera with a shearing device. The processed photographic plate which has been doubly exposed in the image plane with the refractive medium changed between(More)
Evaluation of the surface morphology of short-term retrieved cross-linked acetabular components requires differentiation between the features generated during machining and the smaller-scale morphologies generated during the in vivo wear process. Previously, the distinction between the waviness of machining and the roughness of wear has been related to the(More)
Eight dwarf starburst galaxies have been observed with the Caltech Submillimeter Observatory telescope in the CO J \ 3È2 transition. all but the last two are detected. The central regions of He 2-10 and NGC 5253 were mapped and a CO(2È1) spectrum of NGC 5253 was obtained. The error-weighted mean CO(3È2)/CO(1È0) ratio of the detected galaxies is 0.60 ^ 0.06,(More)
We present the first 100 pc scale view of the dense molecular gas in the central 1.3 kpc of the type-1 Seyfert NGC 1097, traced by HCN (J = 4–3) and HCO + (J = 4–3) lines afforded with ALMA band 7. This galaxy shows significant HCN enhancement with respect to HCO + and CO in the low-J transitions, which seems to be a common characteristic in AGN(More)
23 (ref. 26). 30 Dor is 200 times larger and 100–1,000 times less dense than the supernebula in NGC5253, and its exciting star cluster R136 is 10–100 times less massive than the cluster in NGC5253 (ref. 27). The escape velocity for 30 Dor is less than the thermal sound speed of 10 km s 21 so its gas motions are determined by winds and turbulence rather than(More)